I believe so. I have 3 spots that I used to fish in my Basscat that I can't fish now. I can get into much more shallow water with the 188 and that has paid off for me but I sure miss being able to fish the stump fields during the spawn.
Someone here on the forum went under water and measured the draft of an RT188 at 8.5 inches. This was with two people, full gas tank and a normal load of tackle. He also measured a Ranger glass boat at 17 inches under the same condition. Based on this, I guess the RT198P to draft 12 to 14 inches.